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67 lines
2.6 KiB
JavaScript
67 lines
2.6 KiB
JavaScript
/**
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* Host Metrics - first-party, in-process plugin.
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*
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* This plugin runs on the main thread rather than in a worker for the same
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* reason ssh-terminal and docker do (see src/backend/plugins/first-party.ts):
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* its polling manager holds long-lived ssh2.Client connections across a
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* whole fleet of hosts, reused between polling ticks, and its connect flow
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* implements the same jump-host/SOCKS5/TOTP/Warpgate/OPKSSH/Vault
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* keyboard-interactive handshakes the terminal does. None of that can cross
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* the structured-clone postMessage boundary a worker plugin talks over, and
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* the worker ctx.ssh primitive (connect + single exec-and-collect) has no
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* hook for a session that outlives one request.
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*
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* routes.ts is what used to be src/backend/hosts/metrics/index.ts, moved
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* here and rewritten from a module-scope SIGINT/SIGTERM + listenOnServicePort
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* call into startHostMetricsService()/shutdown(), called from
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* activate()/deactivate() below.
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*
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* Proxmox-related code (metrics/proxmox/*, proxmox-stats-*) stays in core at
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* src/backend/hosts/metrics/ rather than moving here -- it is planned as its
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* own future plugin, so this move does not touch it.
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*/
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import path from "node:path";
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import { fileURLToPath } from "node:url";
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/**
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* Loads a module by its path relative to this file's own directory.
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*
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* The plugin ships beside dist/backend, so in a built server the compiled
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* .js for the moved host-metrics files (routes.js, ...) sits right next to
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* this .mjs, and core modules resolve via ../../../backend/backend/... from
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* there (dist/plugins/host-metrics/backend -> dist/backend/backend). Under
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* vitest/dev nothing imports this plugin directly (the loader loads
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* in-process plugins with a plain dynamic import, no tsx loader involved),
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* so the only layout that needs to resolve here is the built one.
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*/
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async function loadRelative(relativePath) {
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const here = path.dirname(fileURLToPath(import.meta.url));
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const target = path.join(here, `${relativePath}.js`);
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return import(new URL(`file://${target.replace(/\\/g, "/")}`).href);
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}
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let routesModule = null;
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let httpServer = null;
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export async function activate(ctx) {
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routesModule = await loadRelative("routes");
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httpServer = routesModule.startHostMetricsService();
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ctx.log.info(`Host Metrics listening on ${routesModule.PORT ?? 30005}`);
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}
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export async function deactivate() {
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if (routesModule) {
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routesModule.shutdown();
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routesModule = null;
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}
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if (httpServer) {
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const server = httpServer;
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httpServer = null;
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await new Promise((resolve) => server.close(() => resolve()));
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}
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}
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